The Targus does use two CR2032 coin batteries, but I havent had much joy getting mine to work yet.

I bought my keyboard new from ebay about a month ago and have only just tried it out seeing as the new pikey release supports 3.40oe... but I cant get it to work.
Ive tried everything but had no joy so I've just ordered some new batteries to see if that is the problem?
I think I positioned the keyboard infared arm correctly (I followed the picture tutorial from maxconsole) but nothing seems to happen.
I'll post back when i try it again with some fresh batteries.